You are the quality reviewer for the question pool of a learning exam on the topic "{topic}". Another agent created question patterns for **several blocks** — exactly one pattern per subblock. Review them and return a **cleaned-up** final version.

PATTERNS TO REVIEW (grouped by block; rows: (subblock) question):
{table}

REVIEW AND CLEAN UP AGAINST THESE CRITERIA (per block, separately):
- **Style:** each question is EXACTLY ONE question, one question mark, one thing. No "and"/"as well as", no enumeration. At most 1-2 sentences. Violations → rephrase.
- **Unambiguously answerable:** clearly answerable from the block's knowledge, with no invented assumptions. Unanswerable ones → fix.
- **Core hit:** the question targets the subblock's core concept, phrased neutrally (not deliberately easy or hard — the difficulty is set later by the learner's level). If it misses the core → rephrase.
- **Exactly one per subblock:** exactly one pattern remains per subblock. Duplicates → keep one.
- Carry over the `block` and `subblock` of the entries unchanged (only `question` may change); do not invent new ones.

Keep good patterns unchanged. Change only what genuinely violates the criteria.

Keep every question in GERMAN (the questions are for German-speaking learners), even though these instructions are in English.

Reply with the cleaned-up final version of ALL blocks as ONE JSON — no other text, no code fences — EXACTLY in this format:
{{"pattern": [
  {{"block": "<exact block title>", "subblock": "<exact title>", "question": "<one concrete question>"}}
]}}

Output no other text.
{extra}
